Page 1 LASERJET PRO MFP Repair Manual M521...
Page 3 HP LaserJet Pro MFP M521 Printer Repair Manual...
Page 4 Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein. Edition 1, 12/2012...
Page 5 Conventions used in this guide TIP: Tips provide helpful hints or shortcuts. NOTE: Notes provide important information to explain a concept or to complete a task. CAUTION: Cautions indicate procedures that you should follow to avoid losing data or damaging the product.
Page 6 Conventions used in this guide ENWW...
Page 7: Table Of Contents
Table of contents 1 Removal and replacement ....................1 Removal and replacement strategy ..................... 2 General cautions during removal and replacement ............2 Electrostatic discharge ....................2 Required tools ......................3 Types of screws ......................3 Service approach ........................5 Before performing service ..................
Page 8 Right-rear cover ..................30 Tray 1 cover .................... 32 Cartridge-door assembly ................34 Right cover assembly ................36 Lower right cover ..................41 Reinstall the lower right cover ............. 43 I/O plate ....................44 Document feeder assemblies and scanner ..............46 Document feeder/scanner assembly ............
Page 9 Environmental sensor ................128 High-voltage power supply (HVPS) ............130 2 Parts and diagrams ...................... 139 Order parts by authorized service providers ................140 Order parts, accessories, and supplies ..............140 Supplies part numbers ................... 140 Customer self-repair (CSR) and service kits ............... 141 Related documentation and software ..................
Page 10 viii ENWW...
Page 11: Removal And Replacement
Removal and replacement Removal and replacement strategy ● Service approach ● Removal and replacement procedures ● ENWW...
Page 12: Removal And Replacement Strategy
Replacing FRUs is generally the reverse of removal. Occasionally, notes and tips are included to provide directions for difficult or critical replacement procedures. HP does not support repairing individual subassemblies or troubleshooting to the component level. WARNING! Turn the product off, wait 5 seconds, and then remove the power cable before attempting to service the product.
Page 13: Required Tools
Required tools #2 Phillips 152 mm (6 in) screwdriver with magnetic tip ● #2 Phillips 76 mm (3 in) screwdriver with magnetic tip ● Small flat-tip screwdriver ● Small needle-nose pliers ● ESD mat ● Penlight ● CAUTION: Always use a Phillips screwdriver (callout 1). Do not use a Pozidriv® screwdriver (callout 2) or any motorized screwdriver.
Page 14 14 mm Chapter 1 Removal and replacement ENWW...
Page 15: Service Approach
Service approach Product repair normally begins by using the product internal diagnostics and the following two-step process: Isolate the problem to the major system (for example, the network, the server, or the product). Troubleshoot the problem by using the procedures in the solve problems chapter of the Troubleshooting Manual.
Page 16 Print a configuration page, and then verify that the expected printing sounds occur. The fans start and the rollers turn. Print a demo page, and then verify that the print quality is as expected. Send a print job from the host computer, and then verify that the output meets expectations. If necessary, restore any customer-specified settings.
Page 17: Location Of Connectors
Location of connectors DC controller connections Figure 1-2 DC controller connections J2400 J2104 J2103 J2102 J2704 J2703 J2308 J2401 J2303 J231 1 J2701 J2301 J2302 J2310 J2700 J2100 J2306 J2105 J2307 J2304 J2200 J2702 J2201 Item Description Item Description Item Description J2100 Not used...
Page 18 Item Description Item Description Item Description J2104 Subfan (FM2) J2306 Interlock-switch J2701 LVPS (SW260) Rear door sensor (PS8001) Scanner motor (M3) J2105 Power switch J2307 Tray detection J2702 LVPS (SW240) switch (SW235) J2200 HVPS J2308 Main fan (FM1) J2703 Cartridge door switch (SW501) J2201 Paper feeder...
Page 19: Formatter Connections
Formatter connections Figure 1-3 Formatter connections J18 WIFI J21 ADF SCAN J17 THUMB J22 ADF MOTOR SCANNER J8 LAN POWER J16 USB DEVICE J24 SNAPPER FAX Item Description Item Description Control panel Flatbed scanner Power Flatbed motor ADF/Scanner USB Device ADF motor Snapper Fax Wifi...
Page 20: Parts Removal Order
Parts removal order Figure 1-4 Parts removal order: covers and customer-replaceable assemblies 1. covers and customer replaceable assemblies Assembly Remove Remove Remove Remove Remove Toner cartridge Tray2,3 Formatter cover Formatter PCA Formatter cover Formatter cover Formatter cover Fax card and cable Dummy cover Formatter cover Rear cover assy...
Page 21: Removal And Replacement Procedures
Removal and replacement procedures Customer self repair (CSR) assemblies Toner cartridge CAUTION: If toner gets on your clothing, wipe it off with a dry cloth and wash clothing in cold water. Hot water sets toner into fabric. Press the cartridge-door release button, and then open the cartridge door. Make sure that the door is completely open.
Page 22 Grasp the toner-cartridge handle and pull it out of the product. CAUTION: Do not touch the green roller. Doing so can damage the cartridge. Do not expose the cartridge to strong light. Cover the cartridge with a sheet of paper to protect it from light. Reinstallation tip Align the toner cartridge with its slot and insert the toner cartridge until it clicks into place.
Page 23: Tray 2 Or Tray 3 Assembly
Tray 2 or Tray 3 assembly NOTE: Use this procedure to remove the Tray 2 or Tray 3 assembly. Pull the tray straight out of the product until it stops. Carefully lift up on the tray to release it, and ▲...
Page 24: Document Feeder Rollers
Document feeder rollers Document feeder pickup roller CAUTION: Do not touch the surface of the roller. Skin oils deposited on the roller might cause print- quality problems. NOTE: If you did not remove Tray 2 or 3 before servicing the product, remove them now. Carefully place the product front-side up, so that you can see into the opening where the tray would be installed.
Page 25 Release one tab, and then rotate the roller out and away from the product to remove it. TIP: It might be easier to release the tab by using a small flat-tip screwdriver. Figure 1-9 Remove the document feeder pickup roller (2 of 2) Removal and replacement procedures ENWW...
Page 26: Document Feeder Separation Roller
Document feeder separation roller CAUTION: Do not touch the surface of the roller. Skin oils deposited on the roller might cause print- quality problems. Open the document feeder cover. Figure 1-10 Remove the document feeder separation roller (1 of 2) Release one tab, and then rotate the roller out and away from the product to remove it.
Page 27: Document Feeder Separation Pad
Document feeder separation pad CAUTION: Do not touch the surface of the pad. Skin oils deposited on the roller might cause paper- handling problems. Open the document feeder cover. Figure 1-12 Remove the document feeder separation pad (1 of 2) Press down on the document feeder separation pad to release the pad, and then remove the separation pad.
Page 28: External Panels, Covers, Doors, And Formatter
External panels, covers, doors, and formatter Formatter cover Slide the formatter cover toward the rear of the product to remove. ▲ Figure 1-14 Remove the formatter cover Chapter 1 Removal and replacement ENWW...
Page 29: Formatter Pca
Formatter PCA WARNING! ESD sensitive component. Before proceeding, remove the following: Formatter cover. See Formatter cover on page ● Disconnect 10 cables/FFCs (M521dw) or 9 cables/FFCs (M521dn). NOTE: To locate the formatter connector locations, see Formatter connections on page Figure 1-15 Remove the formatter PCA (1 of 2) Remove five screws and then carefully remove the formatter PCA.
Page 30: Fax Pca And Cable
Fax PCA and cable WARNING! ESD sensitive component. Before proceeding, remove the following: Formatter cover. See Formatter cover on page ● Disconnect one connector on the fax PCA. Figure 1-17 Remove the fax PCA and cable (1 of 2) Remove four screws, and then remove the fax PCA from the product. Figure 1-18 Remove the fax PCA and cable (2 of 2) Chapter 1 Removal and replacement...
Page 31: Interconnect Board (Icb)
Interconnect board (ICB) Disconnect two FFCs and two connectors. Figure 1-19 Remove the ICB (1 of 2 Remove two screws. Figure 1-20 Remove the ICB (2 of 2) Remove the ICB. Removal and replacement procedures ENWW...
Page 32: Formatter Stay
Formatter stay Before proceeding, remove the following: Formatter cover. See Formatter cover on page ● Formatter PCA. See Formatter PCA on page ● Fax PCA and cable. See Fax PCA and cable on page ● ICB. See Interconnect board (ICB) on page ●...
Page 33: Dummy Cover
Dummy cover Before proceeding, remove the following components: Formatter cover. See Formatter cover on page ● Remove one screw (callout 1) and release one tab (callout 2). Figure 1-22 Remove the dummy cover (1 of 2) Reinstallation tip Disconnect the control-panel cable from the formatter to provide additional access to the tab.
Page 34: Rear Cover Assembly
Rear cover assembly Open the rear door. Figure 1-24 Remove the rear cover assembly (1 of 8) Gently pull down on the door and lower the door until it is fully open. Figure 1-25 Remove the rear cover assembly (2 of 8) Chapter 1 Removal and replacement ENWW...
Page 35 Push up on the link arm to release it. CAUTION: The link arm is under spring tension. Do not let the link arm snap back toward the product when you release it. Figure 1-26 Remove the rear cover assembly (3 of 8) Remove two screws.
Page 36 Open the lower-rear door, and then release one tab (callout 1). Figure 1-28 Remove the rear cover assembly (5 of 8) Release one tab (callout 1). Figure 1-29 Remove the rear cover assembly (6 of 8) Chapter 1 Removal and replacement ENWW...
Page 37 Rotate the bottom of the rear cover assembly away from the product. Figure 1-30 Remove the rear cover assembly (7 of 8) Pull down on the rear cover assembly to remove it. Figure 1-31 Remove the rear cover assembly (8 of 8) Reinstallation tip Insert the top of the cover first to make sure the tabs are in place and then rotate the bottom of the cover into place.
Page 38: Left Cover
Left cover Before proceeding, remove the following: Rear cover assembly. See Rear cover assembly on page ● Remove one screw (callout 1). Figure 1-32 Remove the left cover (1 of 3) Chapter 1 Removal and replacement ENWW...
Page 39 Grip the cover and pull it away from the product. Release the first tab (callout 1), and then release the second tab (callout 2). Release the third tab (callout 3), if necessary, to separate the cover from the product. TIP: The tab inside the tray cavity (callout 2) is located below the plastic tray rail.
Page 40: Right-Rear Cover
Right-rear cover Before proceeding, remove the following: Formatter cover. See Formatter cover on page ● Rear cover assembly. See Rear cover assembly on page ● Slide the right-rear cover toward the inside of the product to release it. Figure 1-35 Remove the right-rear cover (1 of 2) Rotate the bottom of the cover away from the product, and then pull down on the cover to remove Figure 1-36...
Page 41 Reinstall the right-rear cover Make sure to slide the tab on the top of the cover under the sheet-metal clip. ▲ Figure 1-37 Reinstall the right-rear cover Removal and replacement procedures ENWW...
Page 42: Tray 1 Cover
Tray 1 cover Before proceeding, remove the following: Rear cover assembly. See Rear cover assembly on page ● Left cover. See Left cover on page ● Carefully release two retaining arms (callout 1). Figure 1-38 Remove Tray 1 cover (1 of 3) Slightly lift the cover to a 45 degree angle, and then slide it toward the left side of the product.
Page 43 Remove the Tray 1 cover. Figure 1-40 Remove Tray 1 cover (3 of 3) Removal and replacement procedures ENWW...
Page 44: Cartridge-Door Assembly
Cartridge-door assembly Before proceeding, remove the following: Rear cover assembly. See Rear cover assembly on page ● Left cover. See Left cover on page ● Tray 1 cover. See Tray 1 cover on page ● TIP: The cartridge-door assembly can be removed without removing the Tray 1 cover. However, it is easier to remove and reinstall the door assembly when the Tray 1 cover is not installed.
Page 45 Open the cartridge door slightly and then slide the assembly toward the left side of the product to release it from the hinge pins. CAUTION: You can flex the link arm (callout 1), but be careful not to damage it. Figure 1-42 Remove the cartridge-door assembly (2 of 3) After releasing from the hinge pins, move the cartridge door to the right to release the pressure on...
Page 46: Right Cover Assembly
Right cover assembly Before proceeding, remove the following: Formatter cover. See Formatter cover on page ● Dummy cover. See Dummy cover on page 23 ● Rear cover assembly. See Rear cover assembly on page ● Left cover. See Left cover on page ●...
Page 47 Remove two screws on the right-side of the product. Figure 1-45 Remove the right cover assembly (2 of 5) Remove one screw from the upper-right side of the product. Figure 1-46 Remove the right cover assembly (3 of 5) Removal and replacement procedures ENWW...
Page 48 Release one tab, and then slide the cover toward the front of the product to remove. CAUTION: Do not damage the covers or the cartridge-door assembly (if you did not remove it) when you remove the cover from the product. Do not dislodge the power-switch assembly when you rotate the cover assembly away from the product.
Page 49 Reinstall the right cover Slide the cover onto the product from the front. Make sure the cover is aligned correctly at the top. The top of the cover should slide over the chassis, and the lower section of the cover should slide behind the chassis.
Page 50 Make sure the two tabs are securely inserted. Figure 1-51 Reinstall the right cover assembly (3 of 3) Chapter 1 Removal and replacement ENWW...
Page 51: Lower Right Cover
Lower right cover Before proceeding, remove the following: Formatter cover. See Formatter cover on page ● Formatter PCA. See Formatter PCA on page ● Rear cover assembly. See Rear cover assembly on page ● Left cover. See Left cover on page ●...
Page 52 Raise the right side of the product (callout 1), slide the lower-right cover (callout 2) toward the front of the product, and then rotate the cover away from the product. Figure 1-53 Remove the lower right cover (2 of 3) Remove the lower-right cover.
Page 53: Reinstall The Lower Right Cover
Reinstall the lower right cover Carefully raise the right side of the product, find the three slots in the chassis (callout 1), and the three tabs (callout 2) along the bottom of the cover. Figure 1-55 Reinstall the lower right cover (1 of 2) Rotate the cover up to engage the tabs with the slots, and then slide the cover toward the front of the product to install it.
Page 54: I/O Plate
I/O plate Before proceeding, remove the following: Formatter cover. See Formatter cover on page ● Formatter PCA. See Formatter PCA on page ● Fax PCA. See Fax PCA and cable on page ● ICB, See Interconnect board (ICB) on page ●...
Page 55 Slide the sheet-metal bracket up to release it, and then remove the bracket. NOTE: You might need to pull outward on the lower-right cover (callout 1) to release the sheet- metal bracket. Reinstallation tip When you reinstall the bracket, make sure that the tab is engaged in the slot in the chassis (callout 2).
Page 56: Document Feeder Assemblies And Scanner
Document feeder assemblies and scanner Document feeder/scanner assembly Before proceeding, remove the following: Formatter cover. See Formatter cover on page ● Dummy cover. See Dummy cover on page ● Rear cover assembly. See Rear cover assembly on page ● Left cover. See Left cover on page ●...
Page 57 Feed the FFCs and connectors through their retainers. Figure 1-60 Remove the document feeder/scanner assembly (2 of 7) Disconnect one screw, and then remove the USB ground wire. Figure 1-61 Remove the document feeder/scanner assembly (3 of 7) Removal and replacement procedures ENWW...
Page 58 Remove one screw on the right side of the document feeder/scanner assembly. Figure 1-62 Remove the document feeder/scanner assembly (4 of 7) Remove one screw on the rear-right side of the document feeder/scanner assembly (callout 1) , and then remove the grounding screw on the rear-left side of the document feeder/scanner assembly (callout 2).
Page 59 Remove one screw on the left-side of the document feeder/scanner assembly. NOTE: Rear-right document feeder/scanner ground screw shown still installed in this photo. Figure 1-64 Remove the document feeder/scanner assembly (6 of 7) Slide the document feeder/scanner assembly back, and then pull up to remove. Figure 1-65 Remove the document feeder/scanner assembly (7 of 7) Removal and replacement procedures...
Page 60 Document feeder/scanner whole unit reinstallation When reinstalling the document feeder/scanner assembly, align the four alignment pins on the bottom of the document feeder/scanner assembly with the slots on the chassis. Figure 1-66 Reinstall the document feeder/scanner assembly (1 of 3) Ensure the FFCs and cables are routed through the retainers on the right side of the product.
Page 61 When reinstalling the document feeder ground wire, tuck the grounding wire to the left side so it does not interfere with reinstallation of the left cover assembly. Figure 1-68 Reinstall the document feeder/scanner assembly (3 of 3) Removal and replacement procedures ENWW...
Page 62: Document Feeder Whole Unit Kit And Scanner Whole Unit Kit
Document feeder whole unit kit and scanner whole unit kit Use the following procedure to separate the document feeder assembly from the scanner assembly when either whole unit kit is being replaced. Before proceeding, remove the following: Document feeder/scanner assembly. See Document feeder/scanner assembly on page 46 ●...
Page 63 Carefully separate the adhesive-backed FFC from the document feeder/scanner assembly and remove it from the channel beneath the scanner rear cover. Figure 1-70 Remove the Document feeder whole unit kit and scanner whole unit kit (2 of 6) Removal and replacement procedures ENWW...
Page 64 Cut the plastic cable ties holding the wire harness to the document feeder/scanner assembly and remove it from the channel beneath scanner rear cover. NOTE: Replace the cable ties to secure the wire harness when reinstalling the document feeder/ scanner whole unit. Figure 1-71 Remove the Document feeder whole unit kit and scanner whole unit kit (3 of 6) Figure 1-72...
Page 65 Place the document feeder/scanner assembly right-side up on a flat surface. Lift the document feeder assembly up and release two tabs. Figure 1-73 Remove the Document feeder whole unit kit and scanner whole unit kit (5 of 6) Lift the document feeder assembly up and carefully feed the FFC and wire harness through the slot in the scanner assembly to separate the document feeder assembly from the scanner assembly.
Page 66 Route the FFC (callout 3) and reattach it. Figure 1-75 Document feeder assembly and scanner assembly reinstallation tips Chapter 1 Removal and replacement ENWW...
Page 67: Document Feeder Hinge Assembly
Document feeder hinge assembly Open the document feeder cover. Remove three screws and the document feeder hinge assembly. Figure 1-76 Remove the document feeder hinge assembly Control-panel top-cover Release two tabs on the under-side of the control-panel assembly. Figure 1-77 Remove the control-panel top-cover (1 of 2) Removal and replacement procedures ENWW...
Page 68 Lift the top-cover up to remove. Figure 1-78 Remove the control-panel top-cover (2 of 2) Chapter 1 Removal and replacement ENWW...
Page 69: Control-Panel Assembly
Control-panel assembly WARNING! ESD sensitive component. Before proceeding, remove the following: Control-panel top-cover. See Control-panel top-cover on page ● Press forward on the control-panel sub-cover and remove the sub-cover. Figure 1-79 Remove the control-panel (1 of 3) Remove the ground screw and wire, the screw holding the control-panel to the tray, and one FFC. Figure 1-80 Remove the control-panel (2 of 3) Slide the control-panel assembly forward and remove.
Page 70: Usb Pca
USB PCA NOTE: It is not necessary to remove the control-panel assembly to remove the USB PCA. However, it might be easier to remove the USB PCA with the control-panel assembly removed. Disconnect the ground wire screw and remove the ground wire. Disconnect one screw near the front of the USB PCA subassembly.
Page 71: Control-Panel Ffc
Remove the USB PCA subassembly from the chassis. Figure 1-83 Remove the USB PCA (3 of 4) Place the USB PCA subassembly on a level surface. Remove two screws, and then remove the USB PCA from the sheet metal bracket. Figure 1-84 Remove the USB PCA (4 of 4) Control-panel FFC...
Page 72 Carefully place the document feeder/scanner assembly upside down on a level surface. Carefully separate the black, adhesive-attached scanner and motor FFCs and Wi-Fi module cables from the scanner lower cover. Figure 1-85 Remove the control-panel FFC (1 of 6) Remove three screws from the scanner lower cover. Figure 1-86 Remove the control-panel FFC (2 of 6) Chapter 1 Removal and replacement...
Page 73 Release one tab and remove the scanner lower cover. Feed the USB and Wi-Fi module cables, and the control-panel FFC, through the openings in the lower cover as you are removing the lower cover. Figure 1-87 Remove the control-panel FFC (3 of 6) Press forward on the control-panel sub-cover, and then remove the sub-cover.
Page 74: Usb Cable And Usb Grounding Cable
Disconnect the control-panel FFC from the control-panel assembly. Figure 1-89 Remove the control-panel FFC (5 of 6) Remove the control-panel FFC from the document feeder/scanner assembly. Figure 1-90 Remove the control-panel FFC (6 of 6) USB cable and USB grounding cable Before proceeding, remove the following: Document feeder/scanner assembly.
Page 75 Carefully place the document feeder/scanner assembly upside down on a level surface. Carefully separate the black, adhesive-attached scanner and motor FFCs from the scanner lower cover. Figure 1-91 Remove the USB cable and USB grounding cable (1 of 5) Remove three screws from the scanner lower cover. Figure 1-92 Remove the USB cable and USB grounding cable (2 of 5) Removal and replacement procedures...
Page 76 Release one tab and remove the scanner lower cover. Feed the USB and Wi-Fi module FFCs and the control-panel FFC through the openings in the lower cover as you are removing the lower cover. Figure 1-93 Remove the USB cable and USB grounding cable (3 of 5) Disconnect the USB cable connector from the USB PCA.
Page 77: Wi-Fi Module And Cable
Feed the USB cable and the USB grounding cable through the slot in cover to remove. Figure 1-95 Remove the USB cable and USB grounding cable (5 of 5) USB cable re-installation When reinstalling the USB cable, align the white mark on the cable with the slot near the Wi-Fi ▲...
Page 78 Carefully place the document feeder/scanner assembly upside down on a level surface. Carefully separate the black, adhesive-attached scanner and motor FFCs and Wi-Fi module FFCs from the scanner lower cover. Figure 1-97 Remove the Wi-Fi module and cable (1 of 6) Remove three screws from the scanner lower cover.
Page 79 Release one tab and remove the scanner lower cover. Feed the USB and Wi-Fi module cables and the control-panel FFC through the openings in the lower cover as you are removing the lower cover. Figure 1-99 Remove the Wi-Fi module and cable (3 of 6) Remove one screw, and then remove the Wi-Fi module mounting bracket.
Page 80 Release two tabs, and then remove the Wi-Fi module from the mounting bracket. Figure 1-101 Remove the Wi-Fi module and cable (5 of 6) Disconnect the Wi-Fi cable from the Wi-Fi module. Figure 1-102 Remove the Wi-Fi module and cable (6 of 6) Chapter 1 Removal and replacement ENWW...
Page 81: Main Assemblies
Main assemblies Tray 1 pickup roller CAUTION: Do not touch the surface of the roller. Skin oils deposited on the roller might cause print- quality problems. Press the cartridge-door release button, and then open the cartridge door. Make sure that the door is completely open.
Page 82 Release two tabs, and then rotate the roller out and away from the product to remove it. TIP: It might be easier to release the tabs by using a small flat-tip screwdriver. Figure 1-104 Remove the Tray 1 pickup roller (2 of 2) Chapter 1 Removal and replacement ENWW...
Page 83: Tray 1 Separation Pad
Tray 1 separation pad CAUTION: Do not touch the surface of the pad. Skin oils deposited on the roller might cause paper- handling problems. Press the cartridge-door release button, and then open the cartridge door. Make sure that the door is completely open.
Page 84: Tray 2 Or Tray 3 Pickup Roller
Tray 2 or Tray 3 pickup roller CAUTION: Do not touch the surface of the roller. Skin oils deposited on the roller might cause print- quality problems. NOTE: If you did not remove Tray 2 or Tray 3 before servicing the product, remove them now. Carefully place the product front-side up, so that you can see into the opening where the tray would be installed.
Page 85 Carefully remove the black-plastic guard (callout 1). CAUTION: The guard is partially retained by the bushing removed in the previous step. Do not lose the guard when the bushing is removed. Figure 1-108 Remove the Tray 2 or Tray 3 pickup roller (2 of 3) Slide the roller toward the left side of the product, rotate the right end of the roller away from the product, and then remove the roller assembly.
Page 86: Tray 2 Or Tray 3 Separation Pad
Tray 2 or Tray 3 separation pad CAUTION: Do not touch the surface of the pad. Skin oils deposited on the roller might cause paper- handling problems. Remove the tray. See Tray 2 or Tray 3 assembly on page Remove two screws (callout 1), and then remove the separation pad (callout 2). Figure 1-110 Remove the Tray 2 or Tray 3 separation pad Tray 2 or Tray 3 base-plate roller assembly...
Page 87 Locate the base roller assembly (callout 1), release one tab (callout 2), and then slide the assembly toward the outside of the product to release it. Figure 1-111 Tray 2 or Tray 3 base-plate roller assembly (1 of 2) Remove the base-plate roller assembly. Figure 1-112 Tray 2 or Tray 3 base-plate roller assembly (2 of 2) Removal and replacement procedures...
Page 88: Transfer Roller
Transfer roller CAUTION: Do not touch the black-sponge portion of the transfer roller. Skin oils deposited on the transfer roller might cause print-quality problems. Press the cartridge-door release button, and then open the cartridge door. Make sure that the door is completely open.
Page 89 If necessary, remove the gear, the bushing, and the spring, and then install them on a replacement roller. Figure 1-115 Remove the transfer roller (3 of 3) Removal and replacement procedures ENWW...
Page 90: Fuser
Fuser Before proceeding, remove the following: Rear cover assembly. See Rear cover assembly on page ● Right-rear cover. See Right-rear cover on page ● Release two tabs (callout 1) on the duplex paper-feed guide, and then slide the guide toward the rear of the product to remove it.
Page 91 Disconnect three connectors (callout 1), and then release one wire harness from the retainer (callout 2). Figure 1-117 Remove the fuser (2 of 4) Remove four screws (callout 1). Figure 1-118 Remove the fuser (3 of 4) Removal and replacement procedures ENWW...
Page 92 Pull the fuser out of the back of the product. CAUTION: To avoid damaging the fuser, the cartridge-door assembly must be closed before you remove the fuser. Figure 1-119 Remove the fuser (4 of 4) Chapter 1 Removal and replacement ENWW...
Page 93: Duplex Paper-Feed Assembly
Duplex paper-feed assembly Before proceeding, remove the following components: Rear cover assembly. See Rear cover assembly on page ● Right-rear cover. See Right-rear cover on page ● Release two tabs (callout 1) on the duplex paper-feed guide, and then slide the guide toward the back of the product to remove it.
Page 94 Press the green lever (callout 1) to release the duplex paper-feed assembly. Figure 1-121 Remove the duplex paper-feed assembly (2 of 5) Use a small flat-tip screwdriver to carefully pry the sheet-metal tab on the assembly away from the hinge pin to release it. Figure 1-122 Remove the duplex paper-feed assembly (3 of 5) Chapter 1 Removal and replacement...
Page 95 Slide the assembly away from the other hinge pin to release it. Figure 1-123 Remove the duplex paper-feed assembly (4 of 5) Pull the duplex paper-feed assembly out of the back of the product. Figure 1-124 Remove the duplex paper-feed assembly (5 of 5) Removal and replacement procedures ENWW...
Page 96: Registration Roller Assembly
Registration roller assembly Before proceeding, remove the following components: Rear cover assembly. See Rear cover assembly on page ● Left cover. See Left cover on page ● Unhook the clasp on the registration roller assembly gear (callout 1), and then slide the gear off of the shaft.
Page 97 Lift the registration roller assembly out of the product, gear-end first. Figure 1-127 Removing the registration roller assembly (3 of 3) Removal and replacement procedures ENWW...
Page 98: Power-Switch Assembly
Power-switch assembly WARNING! ESD sensitive component. Before proceeding, remove the following: Formatter cover. See Formatter cover on page ● Dummy cover. See Dummy cover on page 23 ● Rear cover assembly. See Rear cover assembly on page ● Left cover. See Left cover on page ●...
Page 99: Interlock-Switch Assembly
Interlock-switch assembly WARNING! ESD sensitive component. Before proceeding, remove the following: Formatter cover. See Formatter cover on page ● Dummy cover. See Dummy cover on page ● Rear cover assembly. See Rear cover assembly on page ● Left cover. See Left cover on page ●...
Page 100 Remove one screw (callout 1), and then carefully remove the interlock switch assembly. CAUTION: The interlock switch is still connected to the product by two wires. Figure 1-130 Remove the interlock-switch assembly (2 of 3) Release two tabs (callout 1), and then carefully remove two wire connectors. Figure 1-131 Remove the interlock-switch assembly (3 of 3) Chapter 1 Removal and replacement...
Page 101: Tray Sensor Pca
Tray sensor PCA WARNING! ESD sensitive component. Before proceeding, remove the following: Formatter cover. See Formatter cover on page ● Dummy cover. See Dummy cover on page 23 ● Rear cover assembly. See Rear cover assembly on page ● Left cover. See Left cover on page ●...
Page 102 Release one tab. Figure 1-133 Remove the tray sensor PCA (2 of 3) Remove the PCA. Figure 1-134 Remove the tray sensor PCA (3 of 3) Chapter 1 Removal and replacement ENWW...
Page 103: Main Fan
Main fan WARNING! ESD sensitive component. Before proceeding, remove the following: Formatter cover. See Formatter cover on page ● Dummy cover. See Dummy cover on page ● Rear cover assembly. See Rear cover assembly on page ● Left cover. See Left cover on page ●...
Page 104 To remove the main fan only: Release two tabs (callout 1), and then remove the main fan. Reinstallation tip A third tab (callout 2) cannot be engaged. Reinstallation tip If only the main fan was removed: When the fan is reinstalled, the air must flow into the product.
Page 105: Top Cover
Top cover Before proceeding, remove the following: Formatter cover. See Formatter cover on page ● Dummy cover. See Dummy cover on page ● Rear cover assembly. See Rear cover assembly on page ● Left cover. See Left cover on page ●...
Page 106 From the left side of the product, remove two self-tapping screws. Figure 1-139 Remove the top cover (2 of 4) Separate each side of the top cover from the chassis. Figure 1-140 Remove the top cover (3 of 4) Chapter 1 Removal and replacement ENWW...
Page 107 Slide cover toward the front of the product (callout 1), and then lift the front of the cover (callout 2) to remove. Figure 1-141 Remove the top cover (4 of 4) Reinstall the top cover Make sure the tabs on the chassis are correctly inserted into the slots on the cover. ▲...
Page 108: Laser Scanner
Laser scanner WARNING! ESD sensitive component. Before proceeding, remove the following: Formatter cover. See Formatter cover on page ● Dummy cover. See Dummy cover on page ● Rear cover assembly. See Rear cover assembly on page ● Left cover. See Left cover on page ●...
Page 109 Remove the antistatic sponge (callout 1). Figure 1-144 Remove the laser scanner (2 of 5) Disconnect one connector (callout 1) and one FFC (callout 2). Reinstallation tip Make sure that you correctly reconnect the FFC when the laser scanner is installed.
Page 110 Remove four screws (callout 1). Figure 1-146 Remove the laser scanner (4 of 5) Lift the laser scanner up and out of the product. Figure 1-147 Remove the laser scanner (5 of 5) Chapter 1 Removal and replacement ENWW...
Page 111: Tag Holder Assembly
Tag holder assembly Before proceeding, remove the following: Formatter cover. See Formatter cover on page ● Dummy cover. See Dummy cover on page ● Rear cover assembly. See Rear cover assembly on page ● Left cover. See Left cover on page ●...
Page 112: Dc Controller
DC controller WARNING! ESD sensitive component. Before proceeding, remove the following: Formatter cover. See Formatter cover on page ● Dummy cover. See Dummy cover on page ● Rear cover assembly. See Rear cover assembly on page ● Left cover. See Left cover on page ●...
Page 113 Release two tabs, and then carefully remove two wire connectors from the interlock switch assembly. TIP: It might be easier to release these connectors by first removing the interlock switch. See Interlock-switch assembly on page Figure 1-150 Remove the DC controller (2 of 6) Figure 1-151 Remove the DC controller (3 of 6) Removal and replacement procedures...
Page 114 DC controller only: Remove four screws and then remove the PCA. Figure 1-152 Remove the DC controller (4 of 6) DC controller and sheet-metal plate: Do the following. Remove two screws (callout 1), and then remove the fan and duct assembly (callout 2). Figure 1-153 Remove the DC controller (5 of 6) Chapter 1 Removal and replacement...
Page 115 Remove two screws (callout 1), and then remove the PCA and sheet-metal plate. Figure 1-154 Remove the DC controller (6 of 6) Removal and replacement procedures ENWW...
Page 116: Low-Voltage Power Supply (Lvps)
Low-voltage power supply (LVPS) WARNING! ESD sensitive component. Before proceeding, remove the following: Formatter cover. See Formatter cover on page ● Dummy cover. See Dummy cover on page ● Formatter PCA. See Formatter PCA on page ● Rear cover assembly. See Rear cover assembly on page ●...
Page 117 Remove one screw (callout 1), the wire harness holder (callout 2), and the sheet-metal bracket (callout 3). TIP: If the wire harness holder (callout 2) becomes dislodged, replace it as shown below. Figure 1-156 Remove the LVPS (2 of 10) Remove two screws and the plastic retainer.
Page 118 Remove two screws and the sheet metal bracket. Figure 1-158 Remove the LVPS (4 of 10) Remove the main fan. See Main fan on page Disconnect eight connectors and two FFCs from the DC controller. NOTE: To locate DC controller connector locations, see DC controller connections on page Figure 1-159 Remove the LVPS (5 of 10)
Page 119 Release the wire harness from the holders. Figure 1-160 Remove the LVPS (6 of 10) Remove six screws (callout 1) and disconnect one connector (callout 2). Figure 1-161 Remove the LVPS (7 of 10) Removal and replacement procedures ENWW...
Page 120 Lift the LVPS to clear two tabs. Figure 1-162 Remove the LVPS (8 of 8) Tip the LVPS away from the product (callout 1) and then disconnect one FFC (callout 2). Figure 1-163 Remove the LVPS (9 of 10) Reinstallation tip Make sure to reconnect the FFC.
Page 121 Remove the LVPS. Figure 1-164 Remove the LVPS (10 of 10) Reinstall the LVPS The black plastic cap can become dislodged when removing the LVPS. Reattach the cap before ▲ reinstalling the assembly. NOTE: Be sure to reconnect the FFC. A 51 error will occur if it is not connected. Figure 1-165 Reinstall the LVPS Removal and replacement procedures...
Page 122: Tray 2 Paper Pickup Assembly
Tray 2 paper pickup assembly Before proceeding, remove the following: Formatter cover. See Formatter cover on page ● Dummy cover. See Dummy cover on page ● Rear cover assembly. See Rear cover assembly on page ● Left cover. See Left cover on page ●...
Page 123 Turn the product on its side. Remove one screw (callout 1). NOTE: In this figure the gear cover is shown removed for clarity. Do not remove the gear cover yet. The gears behind the cover are not captive and can easily be dislodged if the cover is removed at this time.
Page 124 Remove one screw (callout 1), and then carefully remove the right-side guide (callout 2). CAUTION: Remove the guide carefully. The solenoid and cable remain attached to the guide during removal. Figure 1-168 Remove the Tray 2 paper pickup assembly (3 of 10) Remove one screw (callout 1), and then remove the left-side guide (callout 2).
Page 125 Remove one screw (callout 1), release one tab (callout 2), and then slide the guide toward the front of the product to release it. Remove the guide. Figure 1-170 Remove the Tray 2 paper pickup assembly (5 of 10) Put the product on its side so that the gear cover faces up. Remove three screws (callout 1) and the gear cover.
Page 126 Disconnect one connector. Figure 1-172 Remove the Tray 2 paper pickup assembly (7 of 10) Release one tab (callout 1), and then remove one gear (callout 2). Figure 1-173 Remove the Tray 2 paper pickup assembly (8 of 10) Chapter 1 Removal and replacement ENWW...
Page 127 Remove two screws (callout 1) and the idler roller assembly (callout 2). Figure 1-174 Remove the Tray 2 paper pickup assembly (9 of 10) Remove four screws and the Tray 2 paper pickup assembly. Rotate the left side of the assembly away from the product first, and then remove the right side of the assembly.
Page 128: Tray 1 Or Tray 2 Pickup Solenoid
Tray 1 or Tray 2 pickup solenoid Before proceeding, remove the following: Formatter cover. See Formatter cover on page ● Dummy cover. See Dummy cover on page ● Formatter PCA. See Formatter PCA on page ● Rear cover assembly. See Rear cover assembly on page ●...
Page 129 Put the product on its side so that the gear cover faces up. Remove three screws (callout 1) and the gear cover. Reinstallation tip Note the location of the FFC (callout 2) and the shaft (callout 3) for reinstallation. Figure 1-177 Remove the Tray 1 or Tray 2 pickup solenoid (2 of 3) For the Tray 2 pickup solenoid: Remove one screw (callout 1), and then remove the solenoid (callout 2).
Page 130: Fuser Motor
Fuser motor WARNING! ESD sensitive component. Before proceeding, remove the following: Formatter cover. See Formatter cover on page ● Dummy cover. See Dummy cover on page ● Formatter PCA. See Formatter PCA on page ● Rear cover assembly. See Rear cover assembly on page ●...
Page 131: Pendulum Assembly
Pendulum assembly Before proceeding, remove the following: Formatter cover. See Formatter cover on page ● Dummy cover. See Dummy cover on page ● Formatter PCA. See Formatter PCA on page ● Rear cover assembly. See Rear cover assembly on page ●...
Page 132 On the left side of the product, remove two screws. Figure 1-181 Remove the pendulum assembly (2 of 4) Release four wire harness holders from the chassis and then rotate the output bin roller assembly up to expose the pendulum assembly. TIP: Use needle-nose pliers to release the wire harness holders.
Page 133 Remove one e-clip (callout 1) and the assembly (callout 2). Figure 1-183 Remove the pendulum assembly (4 of 4) Removal and replacement procedures ENWW...
Page 134: Sub Fan And Fan Duct
Sub fan and fan duct Before proceeding, remove the following: Formatter cover. See Formatter cover on page ● Dummy cover. See Dummy cover on page ● Formatter PCA. See Formatter PCA on page ● Rear cover assembly. See Rear cover assembly on page ●...
Page 135 Release the wire harness from the retainers (callout 1), and then feed the wire harness through the opening in the chassis (callout 2). Figure 1-185 Remove the sub fan and fan duct (2 of 5) Release the wire harness from the retainers (callout 1). Figure 1-186 Remove the sub fan and fan duct (3 of 5) Removal and replacement procedures...
Page 136 To remove the fan and duct: Remove two screws (callout 1), and then carefully remove the fan and duct. NOTE: If necessary, release the metal static clip, release two tabs and separate the fan from the duct. Figure 1-187 Remove the sub fan and fan duct (4 of 5) To remove the fan only: Release the metal static clip, release two tabs (callout 1), and then remove the sub fan.
Page 137 Reinstall the sub fan Make sure to correctly reinstall the metal static clip. ▲ Figure 1-189 Reinstall the sub fan (1 of 2) Figure 1-190 Reinstall the sub fan (2 of 2) Removal and replacement procedures ENWW...
Page 138: Environmental Sensor
Environmental sensor Before proceeding, remove the following: Formatter cover. See Formatter cover on page ● Dummy cover. See Dummy cover on page ● Formatter PCA. See Formatter PCA on page ● Rear cover assembly. See Rear cover assembly on page ●...
Page 139 Release the wire harness from the retainers (callout 1), and then remove the sensor. Figure 1-192 Remove the environmental sensor (2 of 2) Removal and replacement procedures ENWW...
Page 140: High-Voltage Power Supply (Hvps)
High-voltage power supply (HVPS) Before proceeding, remove the following: Formatter cover. See Formatter cover on page ● Dummy cover. See Dummy cover on page ● Formatter PCA. See Formatter PCA on page ● Rear cover assembly. See Rear cover assembly on page ●...
Page 141 Place the product on its side with the gear cover facing up. Remove one screw (callout 1). NOTE: In this figure the gear cover is shown removed for clarity. Do not remove the gear cover. The gears behind the cover are not captive and can easily be dislodged if the cover is removed. Figure 1-193 Remove the HVPS (1 of 12) Place the product on its rear side.
Page 142 Remove one screw (callout 1), and then remove the right-side guide (callout 2). CAUTION: Use the caution. The solenoid is still attached. Figure 1-195 Remove the HVPS (3 of 12) Remove one screw (callout 1), and then remove the left-side guide (callout 2). Figure 1-196 Remove the HVPS (4 of 12) Chapter 1 Removal and replacement...
Page 143 Disconnect one connector. Figure 1-197 Remove the HVPS (5 of 12) Remove one screw (callout 1), release one tab (callout 2), and then slide the guide toward the front of the product to release it. Figure 1-198 Remove the HVPS (6 of 12) Removal and replacement procedures ENWW...
Page 144 Remove two screws (callout 1), and then release one tab (callout 2). Let the sub fan and environmental sensor hang from their wire harnesses. Figure 1-199 Remove the HVPS (7 of 12) Remove two screws (callout 1), and then disconnect one connector (callout 2). Figure 1-200 Remove the HVPS (8 of 12) Chapter 1 Removal and replacement...
Page 145 Remove one screw (callout 1). Figure 1-201 Remove the HVPS (9 of 12) Place the product face-side up. Remove two screws (callout 1), and then remove the positioning guide (callout 2). CAUTION: When you place the product face-side up, do not damage the rear-door link arm on the left side of the product.
Page 146 Remove two screws (callout 1), and then remove the plate (callout 2). Figure 1-203 Remove the HVPS (11 of 12) Remove three screws (callout 1), and then remove the HVPS (callout 2). NOTE: Disconnect three connectors and one FFC (callout 3) on the HPVS as you separate the it from the product.
Page 147 Reinstall the HVPS Make sure the HVPS is installed as straight as possible and that it aligns correctly with the ▲ grounding springs. Figure 1-205 Reinstall the HVPS Removal and replacement procedures ENWW...
Page 148 Chapter 1 Removal and replacement ENWW...
Page 149: Parts And Diagrams
Parts and diagrams Order parts by authorized service providers ● Related documentation and software ● Fasteners used in this product ● How to use the parts lists and diagrams ● Assembly locations ● Covers ● Document feeder and scanner assemblies ●...
Page 150: Order Parts By Authorized Service Providers
Order through service or support providers Contact an HP-authorized service or support provider. Order using HP software For information about using the HP software to order parts, accessories, and supplies, see the product user guide. Power cables 8121-0564; India 220 v, 6A 8121-0729;...
Page 151: Customer Self-Repair (Csr) And Service Kits
Customer self-repair (CSR) and service kits Table 2-3 Customer self-repair (CSR) and service kits Item Part number Tray 1 cover kit; includes name plate & HP logo A8P80-65010 Complete 500-sheet feeder for Tray 3; includes cassette CE530-69001 ADF whole unit kit...
Page 152: Related Documentation And Software
Related documentation and software Table 2-4 Related documentation and software Item Description Part number HP LaserJet Pro MFP M521 Printer Printer User Guide Product user guide A8P80-90908 HP LaserJet Pro MFP M521 Printer Repair Manual English service repair manual A8P79-90904...
Page 153: How To Use The Parts Lists And Diagrams
How to use the parts lists and diagrams CAUTION: Be sure to order the correct part. When looking for part numbers for electrical components, pay careful attention to the voltage that is listed. Doing so will make sure that the part number selected is for the correct model.
Page 154: Base Product (Optional Trays Or Accessories)
Base product (optional trays or accessories) Figure 2-2 Base product (optional trays or accessories) Table 2-5 Optional 500-sheet input tray Item Description Connector Tray 2 or Tray 3 Positioning pin Chapter 2 Parts and diagrams ENWW...
Page 155 Assembly locations ENWW...
Page 156: Covers
Covers Figure 2-3 Covers Chapter 2 Parts and diagrams ENWW...
Page 157 Table 2-6 Covers Description Part number Cover, right assembly RM1-8498-000CN Cover, right rear RC2-7673-000CN Cover, handle, right RC2-7675-000CN Cover, formatter RC3-1863-010CN Door, cartridge assembly RM1-8502-000CN Cover kit, Tray 1 A8P80-65010 Multipurpose lifting plate assembly RM1-6325-000CN Cover, top assembly RM1-8516-000CN Cover, left assembly RM1-8517-000CN Cover, rear assembly RM1-8518-000CN...
Page 158: Document Feeder And Scanner Assemblies
Document feeder and scanner assemblies Figure 2-4 Document feeder and scanner assemblies Chapter 2 Parts and diagrams ENWW...
Page 159 Table 2-7 Document feeder and scanner assemblies Description Part number ADF assembly A8P79-60120 Control-panel assembly A8P79-60115 Scanner assembly A8P79-60121 Wi-Fi module 1150-7957 Wi-Fi cable A8P80-60101 Document feeder and scanner assemblies ENWW...
Page 160: Control-Panel And Usb Pca Assemblies
Control-panel and USB PCA assemblies Figure 2-5 Control-panel assembly Chapter 2 Parts and diagrams ENWW...
Page 161 Table 2-8 Control-panel assembly Description Part number Control-panel assembly A8P79-60115 Control-panel FFC A8P79-60106 USB PCA CF368-60001 USB cable A8P79-60102 Control-panel and USB PCA assemblies ENWW...
Page 162: Document Feeder Assemblies
Document feeder assemblies Figure 2-6 Document feeder assemblies Chapter 2 Parts and diagrams ENWW...
Page 163 Table 2-9 Document feeder assemblies Description Part number ADF roller maintenance kit A8P79-65001 ADF separation pad maintenance kit A8P79-65010 ADF assembly A8P79-60120 ADF hinge assembly, left CZ271-60020 ADF hinge assembly, right A8P79-60011 Not shown ADF whole unit kit A8P79-65014 Document feeder assemblies ENWW...
Page 164: Internal Assemblies (1 Of 6)
Internal assemblies (1 of 6) Figure 2-7 Internal assemblies (1 of 6) (J8010) (J12) (J2104) (J8001) (J1702) (J100) A1 1 (J2401) A1 1 A1 1 (PS8001) A1 1 (J8001) A1 1 A1 1 A1 1 A1 1 (J2304) Chapter 2 Parts and diagrams ENWW...
Page 165 Table 2-10 Internal assemblies (1 of 6) Description Part number Tag holder assembly RM1-8521-000CN Laser/scanner RM1-6322-000CN Photo interrupter, IC WG8–5935–000CN Stopper, bushing arm RC2-7928-000CN Cable, flat RK2-4218-000CN Sensor, environmental PCA RM1-8622-000CN Internal assemblies (1 of 6) ENWW...
Page 166: Internal Assemblies (2 Of 6)
Internal assemblies (2 of 6) Figure 2-8 Internal assemblies (2 of 6) TO FIGURE 104 (SL1) (J231 1) (SL2) (J2310) A1 1 Chapter 2 Parts and diagrams ENWW...
Page 167 Table 2-11 Internal assemblies (2 of 6) Description Part number Tray 1 solenoid RK2-1490-000CN Tray 2 solenoid RK2-1492-000CN Internal assemblies (2 of 6) ENWW...
Page 168: Internal Assemblies (3 Of 6)
Internal assemblies (3 of 6) Figure 2-9 Internal assemblies (3 of 6) A1 1 Chapter 2 Parts and diagrams ENWW...
Page 169 Table 2-12 Internal assemblies (3 of 6) Description Part number Registration roller assembly RM1-8507-000CN Roller, multipurpose RL1-2412-000CN Transfer lower guide assembly RM1-6315-000CN Cassette, Tray 2 RM1-8512-000CN Base-plate roller assembly RM1-6306-000CN Roller, transfer RM1-6321-000CN Pad, multipurpose separation RC2-8575-000CN Separation holder assembly RM1-6303-000CN Internal assemblies (3 of 6) ENWW...
Page 170: Internal Assemblies (4 Of 6)
Internal assemblies (4 of 6) Figure 2-10 Internal assemblies (4 of 6) (FM2) (J8010) (PS225) (J513) (PS215) (J507) A1 1 (J1610) Chapter 2 Parts and diagrams ENWW...
Page 171 Table 2-13 Internal assemblies (4 of 6) Description Part number Fan, sub RK2-1499-000CN Lower paper feed guide RM1-6263-000CN Paper-feed guide assembly RM1-6270-000CN Position-guide assembly RM1-6273-000CN High-voltage power supply (HVPS) PCA RM1-8519-000CN Top sensor PCA RM1-8617-000CN Paper-width sensor PCA RM1-8618-000CN Switch assembly RM1-8515-000CN Pendulum service kit RM1-6598-000CN...
Page 172: Internal Assemblies (5 Of 6)
Internal assemblies (5 of 6) Figure 2-11 Internal assemblies (5 of 6) A1 1 (FM1) (J2308) (J22) (J2304) (J2400) (J18) A1 1 (SW501) (J2306) (PS205) (J2302) (PS3) (J2301) Chapter 2 Parts and diagrams ENWW...
Page 173 Table 2-14 Internal assemblies (5 of 6) Description Part number Fan, main RK2-2416-000CN Tray 2, paper pickup assembly RM1-8505-000CN Idler roller assembly RM1-8506-000CN Multipurpose sensor PCA RM1-8621-000CN Fuser assembly RM1-8508-000CN Low-voltage power supply (LVPS) assembly RM1-8514-000CN DC controller PCA RM1-8615-000CN Interlock-switch assembly RM1-8499-000CN Assembly, cassette pick up roller (Tray 2 &...
Page 174: Internal Assemblies (6 Of 6)
Internal assemblies (6 of 6) Figure 2-12 Internal assemblies (6 of 6) (J3) (J4) (J2303) (PS4) (J4) (J8002) (PS1) (M8002) (J3) (J8002) (J2102) (J2201) (J8007) (SW 235) (J2307) Chapter 2 Parts and diagrams ENWW...
Page 175 Table 2-15 Internal assemblies (6 of 6) Description Part number Tray sensor PCA RM1-8620-000CN Fuser motor assembly RM1-8523-000CN Paper-delivery roller assembly RM1-6301-000CN Face-down roller assembly RM1-6311-000CN Photo interrupter, IC WG8-5935-000CN Spring, torsion RC2-8554-000CN Internal assemblies (6 of 6) ENWW...
Page 176: Input Devices
Input devices 500-sheet input tray (Tray 3) Figure 2-13 500-sheet input tray (Tray 3) Chapter 2 Parts and diagrams ENWW...
Page 177 Table 2-16 500-sheet input tray (Tray 3) Description Part number Optional 500-sheet tray and feeder unit CE530-69001 Base-plate roller assembly RM1-6306-000CN Separation holder assembly RM1-6303-000CN Cassette, Tray 3 RM1-6279-000CN Input devices ENWW...
Page 178: Alphabetical Parts List
Alphabetical parts list Table 2-17 Alphabetical parts list Description Part number Table and page 2 ports stay-FMTR A8P79-00015 Internal assemblies (5 of 6) on page 163 ADF assembly A8P79-60120 Document feeder and scanner assemblies on page 149 ADF assembly A8P79-60120 Document feeder assemblies on page 153 ADF hinge assembly, left...
Page 179 Table 2-17 Alphabetical parts list (continued) Description Part number Table and page Cover, handle, right RC2-7675-000CN Covers on page 147 Cover, left assembly RM1-8517-000CN Covers on page 147 Cover, rear assembly RM1-8518-000CN Covers on page 147 Cover, right assembly RM1-8498-000CN Covers on page 147 Cover, right rear RC2-7673-000CN...
Page 180 Table 2-17 Alphabetical parts list (continued) Description Part number Table and page A8P79-60002 Internal assemblies (5 of 6) on page 163 Idler roller assembly RM1-8506-000CN Internal assemblies (5 of 6) on page 163 Interlock-switch assembly RM1-8499-000CN Internal assemblies (5 of 6) on page 163 Laser/scanner RM1-6322-000CN...
Page 181 Table 2-17 Alphabetical parts list (continued) Description Part number Table and page Roller, transfer RM1-6321-000CN Internal assemblies (3 of 6) on page 159 Scanner assembly A8P79-60121 Document feeder and scanner assemblies on page 149 Sensor, environmental PCA RM1-8622-000CN Internal assemblies (1 of 6) on page 155 Separation holder assembly RM1-6303-000CN...
Page 182: Numerical Parts List
Numerical parts list Table 2-18 Numerical parts list Part number Description Table and page 1150-7957 Wi-Fi module Document feeder and scanner assemblies on page 149 9170-2640 Ferrite core Internal assemblies (5 of 6) on page 163 A8P79-00015 2 ports stay-FMTR Internal assemblies (5 of 6) on page 163 A8P79-00016...
Page 183 Table 2-18 Numerical parts list (continued) Part number Description Table and page A8P79-65010 ADF separation pad maintenance kit Document feeder assemblies on page 153 A8P79-65014 ADF whole unit kit Document feeder assemblies on page 153 A8P80-60001 Formatter, standard Internal assemblies (5 of 6) on page 163 A8P80-60101 Wi-Fi cable...
Page 184 Table 2-18 Numerical parts list (continued) Part number Description Table and page RK2-4218-000CN Cable, flat Internal assemblies (1 of 6) on page 155 RL1-2412-000CN Roller, multipurpose Internal assemblies (3 of 6) on page 159 RM1-6263-000CN Lower paper feed guide Internal assemblies (4 of 6) on page 161 RM1-6270-000CN Paper-feed guide assembly...
Page 185 Table 2-18 Numerical parts list (continued) Part number Description Table and page RM1-8505-000CN Tray 2, paper pickup assembly Internal assemblies (5 of 6) on page 163 RM1-8506-000CN Idler roller assembly Internal assemblies (5 of 6) on page 163 RM1-8507-000CN Registration roller assembly Internal assemblies (3 of 6) on page 159 RM1-8508-000CN...
Page 186 Chapter 2 Parts and diagrams ENWW...
Page 187: Index
Index low-voltage power supply accessories electrostatic discharge (ESD) 2 removing 106 ordering 140 environmental sensor after service checklist 5 removing 128 main fan ESD (electrostatic discharge) 2 removing 93 cartridge ordering 140 fasteners notes iii part number 140 screws 142 removing 11 Fax PCA and cable cartridge door...
Page 188 Tray 2 base-plate roller 76 top cover rear cover assembly Tray 2 paper pickup assembly removing 95 removing 24 transfer roller registration roller assembly Tray 2 pickup roller 14, 74 removing 78 removing 86 Tray 2 pickup solenoid tray 1 cover removing parts 74, 76 Tray 2 separation holder 76 removing 32...

HP LaserJet PRO M521 Repair Manua

1 Removal and Replacement

2 Parts and Diagrams

Index

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Summary of Contents for HP LaserJet PRO M521

Table of Contents